From Palmer House®, A Hilton Hotel – Chicago to Caribe Hilton in San Juan, Puerto Rico, 20 storied Hilton Hotels & Resorts properties have been designated to join the prestigious Historic Hotels of America™ organization. The official program of the National Trust for Historic Preservation®, Historic Hotels of America recognizes and celebrates the finest hotels for faithfully maintaining their authenticity, sense of place and architectural integrity. To qualify for the program, hotels must be at least 50 years old, designated by the U.S. Secretary of the Interior as a National Historic Landmark or listed in or eligible for listing in the National Register of Historic Places, and have historic significance. November 17, 2014